Time Difference Between United Kingdom and Mountain Time
As of 31 August 2026, Mountain Time is 7 hours behind United Kingdom. That number is not constant. Over the course of a year, because of daylight saving changes, Mountain Time, United States ranges from 7 hours behind to 6 hours behind relative to London, United Kingdom. The calculator below is always up to date.
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London, United Kingdom
23:34
Mon, Aug 31, 2026
UTC+1 · Europe/London
Mountain Time, United States
-7h16:34
Mon, Aug 31, 2026
UTC-6 · MDT · America/Denver
Mountain Time is 7 hours behind United Kingdom.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| United Kingdom | Monday, August 31, 2026 | Europe/London | UTC+1 | Active now |
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
Mountain Time: Covers Denver and most of the Rocky Mountain states. Switches between MST (UTC-7) and MDT (UTC-6) with daylight saving — unlike Arizona, which stays on MST year-round.
Hour by hour: United Kingdom to Mountain Time
Every hour of today in United Kingdom and what it is in Mountain Time. Highlighted rows fall inside Mountain Time working hours (09:00–18:00).
| United Kingdom | Mountain Time |
|---|---|
| 00:00 | 17:00prev day |
| 01:00 | 18:00prev day |
| 02:00 | 19:00prev day |
| 03:00 | 20:00prev day |
| 04:00 | 21:00prev day |
| 05:00 | 22:00prev day |
| 06:00 | 23:00prev day |
| 07:00 | 00:00 |
| 08:00 | 01:00 |
| 09:00 | 02:00 |
| 10:00 | 03:00 |
| 11:00 | 04:00 |
| United Kingdom | Mountain Time |
|---|---|
| 12:00 | 05:00 |
| 13:00 | 06:00 |
| 14:00 | 07:00 |
| 15:00 | 08:00 |
| 16:00 | 09:00 |
| 17:00 | 10:00 |
| 18:00 | 11:00 |
| 19:00 | 12:00 |
| 20:00 | 13:00 |
| 21:00 | 14:00 |
| 22:00 | 15:00 |
| 23:00 | 16:00 |
Best time to call or meet
Overlapping working hours
16:00–18:00 in United Kingdom (09:00–11:00 in Mountain Time)
Both places are inside 09:00–18:00 for 2 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
15:00–21:00 in United Kingdom (08:00–14:00 in Mountain Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
United Kingdom puts its clocks back on Sunday, October 25, 2026
The local offset moves from UTC+1 to UTC. After that date, Mountain Time is 6 hours behind United Kingdom — instead of 7 hours behind, as it is today.
Mountain Time puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-6 to UTC-7. The gap between United Kingdom and Mountain Time stays at 7 hours because both places change at the same time.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
United Kingdom and Mountain Time: common questions
What is the time difference between United Kingdom and Mountain Time?
As of 31 August 2026, Mountain Time is 7 hours behind United Kingdom. The gap is not fixed: across the year, Mountain Time ranges from 7 hours behind to 6 hours behind relative to United Kingdom, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in United Kingdom, what time is it in Mountain Time?
It is 02:00 AM in Mountain Time, United States. Use the time field in the calculator above to check any other hour.
Is Mountain Time ahead of or behind United Kingdom?
Mountain Time is behind United Kingdom by 7 hours at the moment. In practical terms, the working day in Mountain Time starts and ends later in United Kingdom terms.
Do United Kingdom and Mountain Time observe daylight saving time?
Both United Kingdom and Mountain Time change their clocks, but not on the same dates. That is why the gap is not fixed: across the year, Mountain Time ranges from 7 hours behind to 6 hours behind relative to United Kingdom.
What is the best time to call Mountain Time from United Kingdom?
Working hours overlap between 16:00 and 18:00 United Kingdom time, which is 09:00 to 11:00 in Mountain Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for London, United Kingdom (UTC+1) and Mountain Time, United States (UTC-6) were generated on Monday, August 31, 2026 UTC and refresh in your browser.